Cylinder head for valveless engines



Filed June' 25, 1924 Patented Jan. 13, 1925.

UNIT-ED STATES PATENT OFFICE.

CHARLES SCHAEFFER, OF PARIS, FRANCE, .ASSIGNOR TO SOCIETE ANONYME IDES ANGIENS 'ETABLISSEMENTS PANHARD & LEVASSOB, OE PARIS. FRANCE.

cYL NDER HEAD, FOR va vE Ess ENGINES.

Application filed June 25, 1924. Serial No. 722,307.

To all whom it may concern:

Be it known that I, CHARLES Sonanrrnu, a. citizen of the Republicof France, andresidin'g'at Paris, Seine Department, No. 19 Avenue dIvry, in the Republic ofFra-nce, have invented certain new and useful Improvements; in Cylinder Heads for Valveless Engines, of which the following is a specification.

The present invention relates to a cylinder head for valveless engine which is'so" constructed that a plurality of spark plugs and like devices can be mounted thereon and disposed in the most favourable manner, it being of the type of cylinder heads which are mounted through the interior of the cylinder, but differing therefrom by the fact that the cylinder head may be inserted in the completely finished state and provided with its water jacket. The machine work upon the cylinder head is of a more simple nature, and by reason of the lightness of the said piece, it can be employed to advantage for aerial navigation engines.

The cylinderhead consists of a main body comprising a flat surface of sufficient dimensions to comprise a plurality of bosses adapted to receive the spark-plugs, cocks and the like which are of such nature as to be mounted upon cylinder heads, and of a. water jacket which is separately secured to the body of the cylinder head by autogenous welding'or by other suitable means.

The appended drawings, which are given by way of example, represent two forms of construction of a cylinder head in accordance with the invention.

Fig. 1 is a plan view of the first form of construction, viewed from below.

Fig. 2 is a cross section on the line A B O D of Fig. 1.

Fig. 3 is: a partial cross section of the second form of construction, showing a modification of the method of securing the cylinder head to the water jacket of the cylinder.

' The main body of the cylinder head consists of a cylinder 1 which is formed at its base by a bottom which is convex but comprises a good-sized fiat portion 2; at its upper part, the said cylinder is provided with an internal collar 3 supported at 4: and bearing upon the water chamber 5 of the engine cylinder. The collar 3 is pierced with smooth holes 6 for the water circu1ation between the water chamber of the cylinder head and the like chamber of the cylinder, and alsowith the screwthreaded holes 7 containing thescrew studs 8 serving to secure the collar 3 to the water chamber of the cylinder.

The fiatportion 2 ofthe main body of the cylinder head is: provided with bosses 9 which are pierced and screwthreaded in order to receive the spark-plugs or analogous elements such as relief cocks any suit able number of such bosses may be provided, and they are preferably so disposed as to be situated at the vertices of a regular polygon. whose centre coincides with the axis of the cylinder head. The bosses 9 and the collar 3 have mounted respectively on their periphery the collars 10 and 11 to which is secured, preferably by autoge-nous welding, the water jacket 12 which is suitably cut out and pressed into shape.

Due to this method of securing the cylinder head, no obstacle will be offered to its mounting upon the cylinder by inserting it through the base of the latter, and this allows the use of packing ringsplaced in the slots 13 formed in the body of the cylinder head, thus affording the necessary fiuidtightness without any other packing. By this method I am also enabled to manufacture cylinder heads provided with holes for the water circulation which may be readily calibrated.

The machine work is simplified inasmuch as one part of the cylinder head consists of pressed sheet metal by this feature, I also obtain a very light construction for the cylinder head.

In the modification shown in Fig. 3; a different method is adopted for securing the cylinder head to the water jacket of the cylinder, and instead of employing the screw studs 8, Fig. 1, I make use of a screwthreaded ring 145 screwed into the collar 3 which is screwthreaded to this effect at 15, and which offers a strong support, by means of a shoulder 16 with which it is provided, for the water jacket 5 of the cylinder upon the body of the cylinder head. In this event all the holes in the collar 3 may be smooth.

Claims? 1.. A hollow cylinder head for internal combustion engines, comprising a cupshaped body with convex closed end and'a circular cover whose edge is secured to the said body, the said closed end of the body being provided with a plurality of bosses which are regularly spaced about its centre and are adapted to receive the auxiliary elements such as spark-plugs, cocks and the like, said cover being pierced with apertures through which the said bosses extend and whose edges are secured to the said bosses.

2. A hollow cylinder head for internal combustion engines, comprising a cupshaped body having an inwardly extending flanged edge, and a circular cover whose edge is secured to the said body, the said closed end of the body being provided with a plurality of bosses which are regularly spaced about its centre and are adapted to receive the auxiliary elements such as sparkplugs, cocks and the like, said cover being pierced with apertures through which the said bosses extend and whose edges are secured to the said bosses, the said edge of the body being pierced with a plurality of apertures whereof a certain number are tapped in order to serve for the securing of the said body to thecylinder and the remainder are smooth for the circulation of the cooling fluid. V a H A hollow cylinder head. for. internal combustion engines comprising a cupshaped body with convex closed end and a circular cover whose edge is welded to the said body, the said closed end of the body being provided. with a plurality of bosses which are regularly spaced about its centre and are adapted to receive the auxiliary elements such as spark-plugs, cocks and the like, said cover being pierced with apertures through which the said bosses extend and whose edges are welded to the said bosses.

In testimony that I claim the foregoing as my invention, I have signed my name. CHARLES SCHAEFFER. Witness:

MA RICE Roux. 

